============================================ WARNING: possible recursive locking detected 6.1.139-syzkaller #0 Not tainted -------------------------------------------- syz-executor/4253 is trying to acquire lock: ffff8880278f87c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x39b/0x1530 fs/hfsplus/extents.c:260 but task is already holding lock: ffff8880278fa2c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x28f/0xb30 fs/hfsplus/extents.c:577 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&HFSPLUS_I(inode)->extents_lock); *** DEADLOCK *** May be due to missing lock nesting notation 6 locks held by syz-executor/4253: #0: ffff8880570a6460 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:393 #1: ffff8880278fc680 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #1: ffff8880278fc680 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: do_unlinkat+0x178/0x560 fs/namei.c:4373 #2: ffff8880278fa4c0 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #2: ffff8880278fa4c0 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: vfs_unlink+0xee/0x600 fs/namei.c:4311 #3: ffff88801d7fa198 (&sbi->vh_mutex){+.+.}-{3:3}, at: hfsplus_unlink+0x15a/0x760 fs/hfsplus/dir.c:370 #4: ffff8880278fa2c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x28f/0xb30 fs/hfsplus/extents.c:577 #5: ffff88801d7fa0f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_free+0xbf/0x4b0 fs/hfsplus/bitmap.c:182 stack backtrace: CPU: 0 PID: 4253 Comm: syz-executor Not tainted 6.1.139-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 __lock_acquire+0x122f/0x7c50 kernel/locking/lockdep.c:-1 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x120/0xaf0 kernel/locking/mutex.c:747 hfsplus_get_block+0x39b/0x1530 fs/hfsplus/extents.c:260 block_read_full_folio+0x3c9/0xed0 fs/buffer.c:2271 filemap_read_folio+0x160/0x760 mm/filemap.c:2490 do_read_cache_folio+0x2a0/0x760 mm/filemap.c:3627 do_read_cache_page+0x32/0x220 mm/filemap.c:3669 read_mapping_page include/linux/pagemap.h:791 [inline] hfsplus_block_free+0x128/0x4b0 fs/hfsplus/bitmap.c:185 hfsplus_free_extents+0x176/0xac0 fs/hfsplus/extents.c:363 hfsplus_file_truncate+0x731/0xb30 fs/hfsplus/extents.c:592 hfsplus_delete_inode+0x17c/0x230 fs/hfsplus/inode.c:-1 hfsplus_unlink+0x4c0/0x760 fs/hfsplus/dir.c:405 vfs_unlink+0x385/0x600 fs/namei.c:4322 do_unlinkat+0x324/0x560 fs/namei.c:4390 __do_sys_unlink fs/namei.c:4438 [inline] __se_sys_unlink fs/namei.c:4436 [inline] __x64_sys_unlink+0x45/0x50 fs/namei.c:4436 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ff4c5d8df17 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd62c972d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff4c5d8df17 RDX: 00007ffd62c97300 RSI: 00007ffd62c97390 RDI: 00007ffd62c97390 RBP: 00007ffd62c97390 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffd62c98480 R13: 00007ff4c5e1089d R14: 00000000000733a3 R15: 00007ffd62c99550 hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent hfsplus: invalid extended attribute record hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent